# A Developer Puts Bitcoin Block Verification at 27 Milliseconds and the Full Chain at 17 GPU Years

Proofs now cover blocks 1 through 1,789, and the compute bill to prove the remaining sixteen years of history is the reason nobody has finished.

- Published: 2026-08-23T05:46:20.809Z
- Canonical: https://polylog.news/crypto/2026-08-23/a-developer-puts-bitcoin-block-verification-at-27-millisecon
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [CryptoSlate](https://cryptoslate.com/reaching-instant-27ms-validation-on-bitcoin-will-take-17-gpu-years-of-compute-power/)

A developer working on Hazync, a project applying zero-knowledge proofs to Bitcoin's chain history, reports verification times of about 27 milliseconds per block for the range already proved, blocks 1 through 1,789. The proving campaign for…

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